Ceramic membrane filtration sewage treatment system based on fine control

Abstract

This invention relates to the field of wastewater treatment, and more particularly to a ceramic membrane filtration wastewater treatment system based on refined control. The system includes: a wastewater treatment module for collecting and purifying medical wastewater discharged from various outlets; a drainage monitoring module for monitoring the discharge characteristics of the wastewater to be treated and determining the component interaction coefficients of the wastewater based on these characteristics to determine whether sedimentation treatment is required during pretreatment; a monitoring and analysis module for determining the sludge monitoring method based on wastewater influence parameters and component interaction coefficients; a sludge monitoring module for periodically monitoring the reaction state of activated sludge according to the sludge monitoring method; a sludge conditioning module for adjusting the state of activated sludge used to treat the current wastewater; and a filtration conditioning module for adjusting the wastewater flux during the membrane filtration process. This invention ensures the stability of the wastewater treatment system operation.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more particularly to a ceramic membrane filtration wastewater treatment system based on refined control. Background Technology

[0002] Wastewater treatment is of great significance for environmental protection, maintaining ecological balance, and human health. Due to the presence of drug residues, bacteria, and heavy metal ions in medical wastewater, the treatment process can easily affect the activated sludge used, reducing its subsequent treatment effectiveness. However, current wastewater treatment systems often only judge the biological activity of activated sludge based on the wastewater purification effect and whether the activated sludge is in the expected state. But by this time, the wastewater purification process has already been affected. Therefore, how to provide timely and accurate early warnings based on the state of activated sludge is a problem that urgently needs to be solved by those skilled in the art.

[0003] Chinese Patent Publication No. CN117699964A discloses a wastewater treatment process and monitoring method based on aerobic granular sludge, including: a water volume control module for controlling the inflow of wastewater into an activated aerobic tank based on quantitative indicators of single wastewater treatment, and adding a target amount of aerobic granular sludge to the activated aerobic tank; a data acquisition module for supplying oxygen and mechanically intervening in the activated aerobic tank based on the addition results, and collecting the changes in the wastewater treatment observation indicators in real time; and a wastewater treatment module for comprehensively analyzing the changes in the treatment observation indicators based on the influencing factors of each treatment observation indicator, determining the amplitude of wastewater quality change, and dynamically optimizing the wastewater treatment process using aerobic granular sludge when the amplitude of wastewater quality change does not meet the treatment standards. The above technical solution has the following problems: it fails to select the appropriate sludge monitoring method according to the actual situation of the wastewater to be treated, and fails to provide early warning of sludge status based on the changing trend of sludge status, resulting in a delay in judging the activated sludge status, thus affecting the wastewater treatment effect. Summary of the Invention

[0004] To address this issue, the present invention provides a ceramic membrane filtration wastewater treatment system based on refined control, which overcomes the problem that existing technologies fail to select the appropriate sludge monitoring method according to the actual situation of the wastewater to be treated in the actual process, and fail to make early warnings of sludge status based on the changing trend of sludge status, resulting in a delay in the judgment of activated sludge status and thus affecting the wastewater treatment effect.

[0005] To achieve the above objectives, the present invention provides a ceramic membrane filtration wastewater treatment system based on refined control, comprising:

[0006] The wastewater treatment module is used to collect and purify medical wastewater discharged from various discharge points;

[0007] The drainage monitoring module is connected to the sewage treatment module to monitor the discharge characteristics of the sewage to be treated and determine the component action coefficient of the sewage to be treated based on the discharge characteristics, so as to determine whether sedimentation treatment is required in the pretreatment process.

[0008] The monitoring and analysis module is connected to the wastewater treatment module and the drainage monitoring module respectively, and is used to determine the sludge monitoring method based on the wastewater impact parameters and component interaction coefficients.

[0009] The sludge monitoring module is connected to the wastewater treatment module and the monitoring and analysis module respectively, and is used to respond to the wastewater influence parameters and component action coefficients under monitoring conditions, so as to determine the detection of sedimentation performance parameters or sludge expansion change values ​​accordingly.

[0010] A sludge conditioning module, which is connected to the sludge monitoring module, is used to condition the activated sludge used to treat the wastewater to be treated.

[0011] The filtration regulation module is connected to both the wastewater treatment module and the sludge monitoring module, and is used to regulate the wastewater flux of the membrane filtration process.

[0012] Furthermore, the wastewater treatment module includes,

[0013] Drainage unit, used to collect medical wastewater discharged from each outlet;

[0014] A coarse filtration unit, which is connected to the drainage unit, is used to perform coarse filtration on the collected sewage to remove solid impurities from the water and obtain sewage to be treated.

[0015] A pretreatment unit, connected to the coarse filtration unit, is used to pretreat the wastewater that has undergone coarse filtration, in order to adjust the pH value, organic matter content and chemical composition content of the wastewater.

[0016] A sludge reaction unit, which is connected to the pretreatment unit, is used to treat the pretreated wastewater with activated sludge to degrade the organic matter in the wastewater.

[0017] A ceramic membrane reaction unit, which is connected to the sludge reaction unit, is used to perform fine filtration and purification on the wastewater to be treated after the activated sludge process, so as to remove tiny particles from the wastewater.

[0018] An oxidation unit, connected to the ceramic membrane reaction unit, is used to oxidize the wastewater discharged from the ceramic membrane reaction unit to remove residual organic matter and microbial metabolites.

[0019] Furthermore, the drainage monitoring module responds to wastewater treatment conditions and monitors the discharge characteristics of the wastewater to be treated, including port information of the relevant discharge points of the wastewater to be treated and the proportion of wastewater at each relevant discharge point;

[0020] The wastewater treatment condition is that the increase in volume of the wastewater to be treated in the transition tank is greater than a preset increase in volume.

[0021] Furthermore, the drainage monitoring module determines the component action coefficient of the wastewater to be treated based on the historical components and historical concentrations of the wastewater at each relevant discharge point. The sedimentation condition for the drainage monitoring module is that when the response component action coefficient is greater than the preset component action coefficient, sedimentation treatment is performed on the wastewater to be treated.

[0022] For a single historical component, the historical concentration of that component is determined based on the concentration values ​​recorded for each historical component and the accuracy coefficient of each historical component record.

[0023] Furthermore, the monitoring and analysis module determines the sludge monitoring method based on the wastewater impact parameters and component interaction coefficients for the sludge treatment stage of a single acquisition of wastewater to be treated. The sludge monitoring module then periodically monitors the reaction state of the activated sludge according to the sludge monitoring method.

[0024] The wastewater impact parameters are determined based on the heavy metal ion content in the historical composition records of each relevant discharge point in the wastewater to be treated.

[0025] Furthermore, the sludge monitoring module responds to the monitoring condition that the wastewater impact parameter is greater than the preset wastewater impact parameter, determines the periodic detection of the settling performance parameter, determines the abnormal fluctuation duration of the settling performance parameter based on the settling performance parameter obtained from each detection, and determines the sludge status based on the abnormal fluctuation duration of the settling performance parameter.

[0026] The settling performance parameters are determined based on the settling ratio of the activated sludge.

[0027] Furthermore, the sludge monitoring module responds to the monitoring conditions that the wastewater impact parameter is less than or equal to the preset wastewater impact parameter and the component effect coefficient is greater than the preset component effect coefficient. It determines the periodic detection of sludge expansion change values ​​in different sub-regions of the sludge reaction tank, and records the sub-regions with sludge expansion change values ​​greater than the preset expansion change values ​​as key regions. The sludge status is determined based on the proportion of key regions.

[0028] Furthermore, the abnormal conditions that the sludge monitoring module responds to are when the abnormal fluctuation duration is greater than the preset abnormal fluctuation duration or the proportion of the critical area is greater than the preset critical area proportion. In this case, it is determined that the activated sludge in the sludge reaction process is in an abnormal state and a sludge status warning is sent to the user.

[0029] Furthermore, in response to early warning conditions, the sludge conditioning module adjusts the state of the activated sludge treating the current wastewater, including:

[0030] The content of target microbial populations in activated sludge in different sub-regions was detected, and the circulation speed of the circulating liquid was increased to adjust the dissolved oxygen content based on the differences in the content of target microbial populations in the sub-regions.

[0031] The increase in the circulation rate is positively correlated with the difference in the content of the target population of microorganisms.

[0032] The warning condition is that the sludge monitoring module determines that the activated sludge in the sludge reaction process is in an abnormal state and sends a sludge status warning to the user.

[0033] Furthermore, the filtration adjustment module responds to the condition that the activated sludge is in an abnormal state, and adjusts the wastewater flux of the membrane filtration process by reducing it according to the duration of the abnormal fluctuation or the proportion of the key area.

[0034] The decrease in wastewater flux is positively correlated with the duration of abnormal fluctuations.

[0035] The decrease in wastewater flux is positively correlated with the proportion of key areas.

[0036] Compared with the prior art, the beneficial effects of the present invention are that the technical solution of the present invention determines the targeted sludge monitoring method according to the harmful components of the actual wastewater to be treated, and predicts the sludge state based on the duration of abnormal fluctuations or the proportion of key areas obtained from the monitoring, so as to ensure the timeliness of the judgment of the sludge state and prevent it from affecting the subsequent wastewater treatment process, thereby avoiding the impact on the wastewater treatment system. The present invention ensures the stability of the operation of the wastewater treatment system.

[0037] Furthermore, in this invention, the component action coefficients of the wastewater to be treated are obtained based on the historical components and historical concentrations of each relevant discharge point. Based on the component action coefficients, it is determined whether to perform sedimentation treatment on the wastewater to be treated during the pretreatment process, ensuring the accuracy of the obtained component action coefficients of the wastewater to be treated, thereby ensuring the effectiveness of the pretreatment of the wastewater to be treated, avoiding excessive impact of residual drug components in the wastewater on the activated sludge, and ensuring the stability of the wastewater treatment process.

[0038] Furthermore, in this invention, when the wastewater impact parameter is greater than the preset wastewater impact parameter, the sludge monitoring module periodically detects the settling performance parameter, determines the fluctuation state of the settling performance parameter based on the settling performance parameter obtained from each detection, and judges the sludge state based on the duration of abnormal fluctuations in the settling performance parameter. Since there are heavy metal ion residues in medical wastewater, if the concentration of heavy metal ions is too high, it will easily affect the settling performance of activated sludge. Based on the fluctuation of the settling performance parameter over a period of time, the sludge state is estimated, which can ensure timely judgment while ensuring the accuracy of the judgment result.

[0039] Furthermore, in this invention, when the wastewater impact parameter is less than or equal to the preset wastewater impact parameter and the component effect coefficient is greater than the preset component effect coefficient, the sludge monitoring module periodically detects the sludge expansion change value in different areas of the sludge reaction tank. Areas where the sludge expansion change value is greater than the preset expansion change value are recorded as key areas. The sludge status is determined based on the proportion of key areas. By monitoring the sludge expansion in different areas in real time, the impact of residual drug components on activated sludge is monitored, ensuring that the system can make timely judgments while ensuring the accuracy of the judgment results.

[0040] Furthermore, in this invention, when the activated sludge is in an abnormal state, adjustments are made to the activated sludge and the membrane filtration process. By adjusting the biological state of the activated sludge in advance, the abnormal state of the sludge can be avoided from affecting other aspects of the wastewater treatment system and subsequent treatment. This invention ensures the stability of the wastewater treatment system operation. Attached Figure Description

[0041] Figure 1 This is a module connection diagram of the ceramic membrane filtration wastewater treatment system based on refined control according to the present invention;

[0042] Figure 2 This is a unit connection diagram of the wastewater treatment module of the present invention;

[0043] Figure 3 This is a flowchart illustrating the process of determining whether sedimentation treatment should be performed during the pretreatment stage based on the component interaction coefficients of the wastewater to be treated, according to the present invention.

[0044] Figure 4 This is a flowchart illustrating how the present invention determines sludge monitoring methods based on wastewater impact parameters and component interaction coefficients. Detailed Implementation

[0045] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0046] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0047] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0048] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Please see Figures 1 to 4 As shown, the present invention provides a ceramic membrane filtration wastewater treatment system based on refined control, comprising:

[0050] The wastewater treatment module is used to collect and purify medical wastewater discharged from various discharge points;

[0051] The drainage monitoring module is connected to the sewage treatment module to monitor the discharge characteristics of the sewage to be treated and determine the component action coefficient of the sewage to be treated based on the discharge characteristics, so as to determine whether sedimentation treatment is required in the pretreatment process.

[0052] The monitoring and analysis module is connected to the wastewater treatment module and the drainage monitoring module respectively, and is used to determine the sludge monitoring method based on the wastewater impact parameters and component interaction coefficients.

[0053] The sludge monitoring module is connected to the wastewater treatment module and the monitoring and analysis module respectively, and is used to respond to the wastewater influence parameters and component action coefficients under monitoring conditions, so as to determine the detection of sedimentation performance parameters or sludge expansion change values ​​accordingly.

[0054] A sludge conditioning module, which is connected to the sludge monitoring module, is used to condition the activated sludge used to treat the wastewater to be treated.

[0055] The filtration regulation module is connected to both the wastewater treatment module and the sludge monitoring module, and is used to regulate the wastewater flux of the membrane filtration process.

[0056] In this invention, the application scenario is to treat medical wastewater generated by different departments of a hospital. All the wastewater being treated is medical wastewater. Different discharge points indicate different sources of wastewater. Each discharge point corresponds to a hospital department, including but not limited to internal medicine, emergency medicine, obstetrics and gynecology, and surgery. It is easy to understand that the composition of the medical wastewater discharged from different discharge points is different.

[0057] Specifically, the wastewater treatment module includes,

[0058] Drainage unit, used to collect medical wastewater discharged from each outlet;

[0059] A coarse filtration unit, which is connected to the drainage unit, is used to perform coarse filtration on the collected sewage to remove solid impurities from the water and obtain sewage to be treated.

[0060] A pretreatment unit, connected to the coarse filtration unit, is used to pretreat the wastewater that has undergone coarse filtration, in order to adjust the pH value, organic matter content and chemical composition content of the wastewater.

[0061] A sludge reaction unit, which is connected to the pretreatment unit, is used to treat the pretreated wastewater with activated sludge to degrade the organic matter in the wastewater.

[0062] A ceramic membrane reaction unit, which is connected to the sludge reaction unit, is used to perform fine filtration and purification on the wastewater to be treated after the activated sludge process, so as to remove tiny particles from the wastewater.

[0063] An oxidation unit, connected to the ceramic membrane reactor unit, is used to perform advanced oxidation treatment on the wastewater discharged from the ceramic membrane reactor unit to remove residual organic matter and microbial metabolites.

[0064] The invention includes several transition tanks where the coarsely filtered wastewater undergoes preliminary physical filtration. The coarsely filtered wastewater is discharged into these transition tanks for pretreatment. The pretreatment unit performs pretreatment operations on the wastewater in the transition tanks, including but not limited to adjusting the pH value, removing some organic matter, and sedimentation. The sludge reaction unit completes the activated sludge reaction in the sludge reaction tank. By mixing the activated sludge with the pretreated wastewater, the activated sludge reacts with the pretreated wastewater. The sludge process purifies wastewater by removing pollutants such as organic matter, nitrogen, and phosphorus. The ceramic membrane reactor further purifies the wastewater through a ceramic membrane. The ceramic membrane filtration methods used in this invention include, but are not limited to, hollow fiber ceramic membrane methods or flat-panel ceramic membrane methods. A ceramic membrane is formed by wrapping a layer of ceramic membrane on a fiber cloth and assembling ceramic membrane tubes within a membrane shell. Wastewater enters the ceramic membrane through the membrane shell and is filtered, separating impurities, suspended solids, and bacteria. Before the initial treatment of the wastewater, the contents of the membrane need to be drained. The air and impurities treatment process involves adjusting parameters such as water pressure and flow according to the actual working scenario to ensure the normal operation of the membrane module. The oxidation unit utilizes strong oxidants for advanced oxidation treatment of wastewater. This advanced oxidation process uses specific catalysts and oxidants to generate active oxygen species to accelerate the oxidative degradation of organic matter. During treatment, the catalyst absorbs light energy or oxygen to generate high-energy active oxygen species. These active oxygen species directly oxidize organic pollutants, decomposing them into small molecules or harmless substances, further degrading the organic matter in the wastewater. The advanced oxidation treatment methods used in this invention include, but are not limited to, ozone oxidation, photocatalytic oxidation, ozone-hydrogen peroxide mixed treatment, and ozone-ultraviolet combined technology. The oxidants used include, but are not limited to, chlorine, potassium permanganate, and blue oxygen. The catalysts used can be titanium dioxide and metal ions such as iron and chromium. The generated active oxygen species include, but are not limited to, superoxide ions and hydroxyl radicals. How each of the above units treats wastewater is easily understood by those skilled in the art and will not be elaborated here. This invention also does not impose specific limitations on the device models used in each unit of the wastewater treatment module; users can make adaptive selections based on their actual working scenarios.

[0065] Specifically, the drainage monitoring module responds to sewage treatment conditions and monitors the discharge characteristics of the sewage to be treated. The discharge characteristics include port information of the relevant discharge ends of the sewage to be treated and the proportion of sewage at each relevant discharge end.

[0066] The wastewater treatment condition is that the increase in volume of the wastewater to be treated in the transition tank is greater than a preset increase in volume.

[0067] If medical wastewater is discharged from a certain discharge point in the wastewater to be treated, then that discharge point is determined to be a relevant discharge point for the wastewater to be treated. The hospital department corresponding to the relevant discharge point is recorded as port information. For a single relevant discharge point, the wastewater proportion is the ratio of the volume of medical wastewater discharged from that relevant discharge point to the volume of wastewater to be treated. In this invention, a cyclic volume detection cycle is applied. The duration of the volume detection cycle can be determined by the user according to the actual working scenario. One volume detection cycle duration is provided. The sludge monitoring cycle is 5 minutes. At the end of each volume detection cycle, the volume of wastewater to be treated in each transition tank is detected. For a single transition tank, the volume increase value is the difference between the volume of wastewater to be treated at the end of the current volume detection cycle and the volume of wastewater to be treated at the end of the previous volume detection cycle. The preset volume increase value can be set by the user according to the actual working scenario. One preset volume increase value is provided. The preset volume increase value is 50 m³.

[0068] Specifically, the drainage monitoring module determines the component action coefficient of the wastewater to be treated based on the historical components and historical concentrations of the wastewater at each relevant discharge point. The sedimentation condition for the drainage monitoring module is that when the response component action coefficient is greater than the preset component action coefficient, sedimentation treatment is performed on the wastewater to be treated.

[0069] For a single historical component, the historical concentration of that component is determined based on the concentration values ​​recorded for each historical component and the accuracy coefficient of each historical component record.

[0070] In this invention, for each discharge point, the medical wastewater discharged must undergo component testing, and the obtained components and concentrations are recorded in the historical component record. Each historical component record corresponds only to a single discharge point of medical wastewater. For a single historical component record, the historical component is the component contained in that historical component record, and the historical component concentration is the concentration of the component contained in that historical component record. The components that the wastewater to be treated may contain include, but are not limited to, various antibiotics, hormones, and other drug components. The component interaction coefficient is the natural logarithm of the product of the number of historical components with interaction relationship and the historical concentration of the corresponding historical component. If two historical components can react chemically to produce new chemical components, and the newly produced chemical components can have a negative impact on activated sludge, then it is determined that the two historical components have an interaction relationship. For a single historical component, the historical concentration of that historical component is the product of the concentration value of each historical component record and the accuracy coefficient of each historical component record. The accuracy coefficient of each historical component record is determined according to the precision of the instrument used to detect the component concentration each time. The higher the precision of the instrument, the greater the accuracy coefficient of the corresponding historical component record.

[0071] The value of the preset component action coefficient can be set by the user according to actual needs and historical records. The higher the user's requirements for the biological activity of activated sludge, the smaller the value of the preset component action coefficient. A method for setting the value of the preset component action coefficient is provided, which records the historical records in which the activated sludge does not show abnormal conditions as reference records, and sets the average value of the preset component action coefficients of each wastewater to be treated in the reference records that meet the user's requirements for the biological activity of activated sludge as the preset wastewater influence parameter.

[0072] The precipitation treatment involves adding a precipitant to the waste liquid, causing the drug molecules to react with the precipitant to form a water-insoluble precipitate. The precipitants used include, but are not limited to, aluminum sulfate, calcium hydroxide, and sodium sulfide. How to complete the precipitation treatment and how to select a suitable precipitant are topics that are easy to understand for those skilled in the art, and will not be elaborated here.

[0073] Specifically, the monitoring and analysis module determines the sludge monitoring method based on the wastewater impact parameters and component interaction coefficients for the sludge treatment stage of a single acquisition of wastewater to be treated. The sludge monitoring module then periodically monitors the reaction state of the activated sludge according to the sludge monitoring method.

[0074] The wastewater impact parameters are determined based on the heavy metal ion content in the historical composition records of each relevant discharge point in the wastewater to be treated.

[0075] In this invention, the activated sludge is the sludge that reacts with the wastewater to be treated in the sludge reaction tank. The start time of the sludge treatment stage is the moment when the wastewater to be treated begins to enter the sludge reaction tank, and the end time of the sludge treatment stage is the moment when the wastewater to be treated begins to be discharged from the sludge reaction tank. The sludge reaction tank includes, but is not limited to, an aeration tank and a secondary sedimentation tank. The wastewater impact parameters are the sum of the products of the content of each type of heavy metal and its corresponding impact coefficient. Users can set the impact coefficients corresponding to the content of each type of heavy metal according to the actual working conditions.

[0076] This invention employs a cyclic sludge monitoring cycle. The duration of the sludge monitoring cycle can be determined by the user. The higher the user's requirements for the stability of the wastewater treatment system, the shorter the duration of the sludge monitoring cycle. A sludge monitoring cycle of 15 minutes is provided. At the end of each sludge monitoring cycle, the settling performance parameters of the activated sludge or the sludge expansion change values ​​in different areas are detected.

[0077] Specifically, the sludge monitoring module responds to the monitoring condition that the wastewater impact parameter is greater than the preset wastewater impact parameter, determines the periodic detection of the settling performance parameter, determines the abnormal fluctuation duration of the settling performance parameter based on the settling performance parameter obtained from each detection, and determines the sludge status based on the abnormal fluctuation duration of the settling performance parameter.

[0078] The settling performance parameters are determined based on the settling ratio of the activated sludge.

[0079] The user can set the value of the preset wastewater impact parameter according to actual needs and historical records. The higher the user's requirements for the biological activity of activated sludge, the lower the value of the preset wastewater impact parameter. A method for setting the value of the preset wastewater impact parameter is provided, which is to set the average value of the wastewater impact parameter of each wastewater to be treated in the reference record that meets the user's requirements for the biological activity of activated sludge as the preset wastewater impact parameter.

[0080] If the settling ratio is within the warning-free range, the settling performance parameter is negatively correlated with the settling ratio of activated sludge. If the settling ratio is not within the warning-free range, it is determined that the activated sludge needs to be adjusted. In this invention, no specific limitation is made on the instrument for rapid detection of the settling ratio of activated sludge. How to detect the settling ratio of activated sludge is a content that is easy for those skilled in the art to understand and will not be elaborated here. For a single settling performance parameter detection, if the absolute value of the difference between the settling performance parameter at this moment and the settling performance parameter at the previous moment is greater than the preset settling performance difference value, it is determined that the sludge monitoring cycle corresponding to this moment is in an abnormal fluctuation state. The abnormal fluctuation duration is the product of the number of sludge monitoring cycles included in the abnormal fluctuation interval and the duration of the sludge monitoring cycle. Any sludge monitoring cycle in the abnormal fluctuation interval is in an abnormal fluctuation state and the abnormal fluctuation interval includes the sludge monitoring cycle corresponding to the current moment.

[0081] When the wastewater impact parameters are greater than the preset wastewater impact parameters, it indicates that the concentration of heavy metal ions in the wastewater to be treated may be high. Activated sludge will experience changes in settling performance due to the high concentration of heavy metal ions. Although the settling performance of activated sludge always meets the requirements during the reaction process, judging the sludge state by its fluctuations can allow for early adjustments to the activated sludge, avoiding impacting the stability of the wastewater treatment process.

[0082] Specifically, the sludge monitoring module responds to the monitoring conditions when the wastewater impact parameter is less than or equal to the preset wastewater impact parameter and the component effect coefficient is greater than the preset component effect coefficient. It determines the periodic detection of sludge expansion change values ​​in different sub-regions of the sludge reaction tank, and records the sub-regions with sludge expansion change values ​​greater than the preset expansion change values ​​as key regions. The sludge status is determined based on the proportion of key regions.

[0083] In this invention, the sludge reaction tank is divided into regions, and the bottom area of ​​the sludge reaction tank corresponding to each sub-region is equal. The invention does not impose specific limitations on the number of sub-regions or the bottom area of ​​the sludge reaction tank corresponding to each sub-region; users can adaptively set these parameters according to their actual working scenarios. For each detection of sludge expansion change value, the sludge expansion change value is the absolute value of the difference between the activated sludge volume detected at the current moment in each sub-region and the activated sludge volume detected at the end of the previous sludge detection cycle. The preset expansion change value can be set by the user based on actual needs and historical records. The higher the user's requirements for the stability of the wastewater treatment system, the smaller the preset expansion change value. A method for determining the preset expansion change value is provided, whereby the average value of the sludge expansion change values ​​measured in each sub-region in the reference record that meets the user's requirements for the stability of the wastewater treatment system is recorded as the preset expansion change value. The key region proportion = number of key regions / number of sub-regions within the sludge reaction tank.

[0084] When the wastewater impact parameter of the wastewater to be treated is less than or equal to the preset wastewater impact parameter and the component action coefficient is greater than the preset component action coefficient, it indicates that the residual drug concentration in the wastewater to be treated may be high. Although some residual drug components are removed by sedimentation during the pretreatment process, it is still necessary to monitor in real time whether the activated sludge is affected by the residual drug components. By monitoring the proportion of key areas, the degree of impact on the activated sludge can be effectively indicated, and the activated sludge can be adjusted in a timely manner to avoid affecting the stability of the wastewater treatment process.

[0085] If the wastewater impact parameter is less than or equal to the preset wastewater impact parameter and the component effect coefficient is less than or equal to the preset component effect coefficient, the sludge monitoring module only detects the settling ratio of activated sludge at the end of the sludge treatment stage, and determines whether to adjust the state of activated sludge based on the settling ratio. If the settling ratio is not within the corresponding warning-free range, that is, the settling ratio is greater than the minimum value of the warning-free range and less than or equal to the maximum value of the warning-free range, the state of activated sludge is adjusted. The warning-free range can be adaptively set by the user according to the actual situation, providing a maximum and minimum value of the warning-free range. The maximum value of the warning-free range is 30%, and the minimum value of the warning-free range is 15%.

[0086] Specifically, the abnormal conditions that the sludge monitoring module responds to are when the duration of abnormal fluctuations is greater than the preset duration of abnormal fluctuations or the proportion of key areas is greater than the preset proportion of key areas. In this case, the module determines that the activated sludge in the sludge reaction process is in an abnormal state and sends a sludge status warning to the user.

[0087] The user can set the preset abnormal fluctuation duration and preset key area percentage based on actual needs and historical records. The higher the user's requirements for the stability of the sewage treatment system, the smaller the preset abnormal fluctuation duration and the preset key area percentage. A method for setting the preset abnormal fluctuation duration is provided, which is to record the average of the abnormal fluctuation durations in the historical records that meet the user's requirements for the stability of the sewage treatment system as the preset abnormal fluctuation duration. A method for setting the preset key area percentage is provided, which is to record the average of the key area percentages detected in the historical records that meet the user's requirements for the stability of the sewage treatment system as the preset key area percentage.

[0088] Specifically, the sludge conditioning module responds to early warning conditions and conditions the activated sludge used to treat the current wastewater. This condition conditioning includes:

[0089] The content of target microbial populations in activated sludge in different sub-regions was detected, and the circulation speed of the circulating liquid was increased to adjust the dissolved oxygen content based on the differences in the content of target microbial populations in the sub-regions.

[0090] The increase in the circulation rate is positively correlated with the difference in the content of the target population of microorganisms.

[0091] The warning condition is that the sludge monitoring module determines that the activated sludge in the sludge reaction process is in an abnormal state and sends a sludge status warning to the user.

[0092] In this process, several samples of activated sludge were randomly extracted from different sub-regions, and the types and quantities of microorganisms contained therein were tested. The target microbial population content of a single sub-region was the average value of the number of target microorganisms in each sample of activated sludge. The difference in target microbial population content was calculated as the sum of the absolute values ​​of the differences between the target microbial population content of each sub-region and the average target content, divided by the number of sub-regions in the sludge reactor. The circulation speed was the flow rate of the circulating liquid in the sludge reactor, and the circulating liquid was a mixture of wastewater to be treated and activated sludge.

[0093] The target microbial population refers to the microorganisms that the user wishes to have in a dominant state during the sludge activation reaction process. The user can set the target microbial population according to actual needs. How to detect the types and quantities of microorganisms is a topic that is easy for those skilled in the art to understand, and will not be elaborated here.

[0094] Specifically, the filtration adjustment module responds to the condition that the activated sludge is in an abnormal state, and adjusts the wastewater flux of the membrane filtration process by reducing it according to the duration of the abnormal fluctuation or the proportion of the key area.

[0095] The decrease in wastewater flux is positively correlated with the duration of abnormal fluctuations.

[0096] The decrease in wastewater flux is positively correlated with the proportion of key areas.

[0097] Specifically, when adjusting the wastewater flux, if the parameter indicating that the activated sludge is in an abnormal state is the duration of abnormal fluctuation, the wastewater flux of the membrane filtration process is reduced based on the duration of abnormal fluctuation. If the parameter indicating that the activated sludge is in an abnormal state is the proportion of critical areas, the wastewater flux of the membrane filtration process is reduced based on the proportion of critical areas. The wastewater flux is the volume of wastewater to be treated that completes membrane filtration per unit time. Since activated sludge is in an abnormal state, it is prone to producing water-insoluble flocculent matter. Reducing the wastewater flux can prevent the filter membrane from becoming clogged, thereby avoiding affecting the stability of the wastewater treatment process.

[0098] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0099] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A ceramic membrane filtration wastewater treatment system based on refined control, characterized in that, include: The wastewater treatment module is used to collect and purify medical wastewater discharged from various discharge points; The drainage monitoring module is connected to the sewage treatment module to monitor the discharge characteristics of the sewage to be treated and determine the component action coefficient of the sewage to be treated based on the discharge characteristics, so as to determine whether sedimentation treatment is required in the pretreatment process. The monitoring and analysis module is connected to the wastewater treatment module and the drainage monitoring module respectively, and is used to determine the sludge monitoring method based on the wastewater impact parameters and component interaction coefficients. The sludge monitoring module is connected to the wastewater treatment module and the monitoring and analysis module respectively, and is used to respond to the wastewater influence parameters and component action coefficients under monitoring conditions, so as to determine the detection of sedimentation performance parameters or sludge expansion change values ​​accordingly. A sludge conditioning module, which is connected to the sludge monitoring module, is used to condition the activated sludge used to treat the wastewater to be treated. A filtration adjustment module, which is connected to the wastewater treatment module and the sludge monitoring module respectively, is used to adjust the wastewater flux of the membrane filtration process; The drainage monitoring module determines the component action coefficient of the wastewater to be treated based on the historical components and historical concentrations of the wastewater at each relevant discharge point. The sedimentation condition for the drainage monitoring module is that when the response component action coefficient is greater than the preset component action coefficient, sedimentation treatment is performed on the wastewater to be treated. For a single historical component, the historical concentration of that component is determined based on the concentration values ​​recorded for each historical component and the accuracy coefficient of each historical component record. The monitoring and analysis module determines the sludge monitoring method based on the wastewater impact parameters and component interaction coefficients for the sludge treatment stage of a single acquisition of wastewater to be treated. The sludge monitoring module then periodically monitors the reaction state of the activated sludge according to the sludge monitoring method. The wastewater impact parameters are determined based on the heavy metal ion content in the historical composition records of each relevant discharge point in the wastewater to be treated. The sludge monitoring module responds to the monitoring condition that the wastewater impact parameter is greater than the preset wastewater impact parameter, determines the periodic detection of the settling performance parameter, determines the abnormal fluctuation duration of the settling performance parameter based on the settling performance parameter obtained from each detection, and determines the sludge status based on the abnormal fluctuation duration of the settling performance parameter. The settling performance parameters are determined based on the settling ratio of the activated sludge; The sludge monitoring module responds to the monitoring conditions when the wastewater impact parameter is less than or equal to the preset wastewater impact parameter and the component action coefficient is greater than the preset component action coefficient. It determines the periodic detection of sludge expansion change values ​​in different sub-regions of the sludge reaction tank, and records the sub-regions with sludge expansion change values ​​greater than the preset expansion change values ​​as key regions. The sludge status is determined based on the proportion of key regions. The component interaction coefficient is the natural logarithm of the product of the number of historical components with interaction relationships and the historical concentration of the corresponding historical components. The sludge bulking change value is the absolute value of the difference between the activated sludge volume detected at the current moment in each sub-region and the activated sludge volume detected at the end of the previous sludge detection cycle. The wastewater impact parameter is the sum of the products of the content of each type of heavy metal and its corresponding impact coefficient.

2. The ceramic membrane filtration wastewater treatment system based on refined control according to claim 1, characterized in that, The wastewater treatment module includes: Drainage unit, used to collect medical wastewater discharged from each outlet; A coarse filtration unit, which is connected to the drainage unit, is used to perform coarse filtration on the collected sewage to remove solid impurities from the water and obtain sewage to be treated. A pretreatment unit, connected to the coarse filtration unit, is used to pretreat the wastewater that has undergone coarse filtration, in order to adjust the pH value, organic matter content and chemical composition content of the wastewater. A sludge reaction unit, which is connected to the pretreatment unit, is used to treat the pretreated wastewater with activated sludge to degrade the organic matter in the wastewater. A ceramic membrane reaction unit, which is connected to the sludge reaction unit, is used to perform fine filtration and purification on the wastewater to be treated after activated sludge treatment, so as to remove tiny particles from the wastewater. An oxidation unit, connected to the ceramic membrane reaction unit, is used to oxidize the wastewater discharged from the ceramic membrane reaction unit to remove residual organic matter and microbial metabolites.

3. The ceramic membrane filtration wastewater treatment system based on refined control according to claim 2, characterized in that, The drainage monitoring module responds to sewage treatment conditions and monitors the discharge characteristics of the sewage to be treated. The discharge characteristics include port information of the relevant discharge ends of the sewage to be treated and the proportion of sewage at each relevant discharge end. The wastewater treatment condition is that the increase in volume of the wastewater to be treated in the transition tank is greater than a preset increase in volume.

4. The ceramic membrane filtration wastewater treatment system based on refined control according to claim 3, characterized in that, The sludge monitoring module responds to abnormal conditions when the duration of abnormal fluctuations exceeds the preset duration of abnormal fluctuations or the proportion of critical areas exceeds the preset proportion of critical areas. It then determines that the activated sludge in the sludge reaction process is in an abnormal state and sends a sludge status warning to the user.

5. The ceramic membrane filtration wastewater treatment system based on refined control according to claim 4, characterized in that, The sludge conditioning module responds to early warning conditions and conditions the activated sludge used to treat the current wastewater. This condition conditioning includes: The content of target microbial populations in activated sludge in different sub-regions was detected, and the circulation speed of the circulating liquid was increased to adjust the dissolved oxygen content based on the differences in the content of target microbial populations in the sub-regions. The increase in the circulation rate is positively correlated with the difference in the content of the target population of microorganisms; The warning condition is that the sludge monitoring module determines that the activated sludge in the sludge reaction process is in an abnormal state and sends a sludge status warning to the user.

6. The ceramic membrane filtration wastewater treatment system based on refined control according to claim 5, characterized in that, The filtration regulation module responds when the activated sludge is in an abnormal state, and reduces the wastewater flux of the membrane filtration process based on the duration of the abnormal fluctuation or the proportion of the critical area. The decrease in wastewater flux is positively correlated with the duration of abnormal fluctuations. The decrease in wastewater flux is positively correlated with the proportion of key areas.

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